Fugou Longli Cylinder Cover Co., LTD. - What is the structure and assembly technology of diesel cylinder cover components? Cylinder cover and other parts installation technical requirements are as follows: (1) The cylinder head shall undergo a hydraulic test of 0.4 MPa after machining, and shall not leak for more than 2 minutes. (2) The bottom plane of the cylinder cover should be flat, without warping, pits, pitting and other defects. (3) The air-cooled diesel engine is cast with aluminum alloy, and there is a heat sink on the periphery, which accelerates cooling and cannot be blocked. Water cooled diesel engine cylinder head cast water channel, must ensure smooth. (4) The intake and exhaust passage and cooling water channel on the cylinder cover need to be carefully cleaned, and there should be no dirt such as sand, iron filings, and abrasive paste. (5) Valve seat ring, valve guide, combustion chamber insert with the mounting hole interference, heating the cylinder head or pressing with special tools during installation. When the combustion chamber insert is pressed, pay attention to the orientation of the main jet hole, and do not deviate. (6) The cylinder head bolt is tightened diagonally according to a certain tightening torque, and shall not be too loose, too tight or not too tight. (7) The cylinder head gasket has a certain thickness, which can not be arbitrarily increased or decreased, nor can it be reversed, so as not to block the oil passage hole and the water channel hole. Quality aging, warping or warping should be replaced. There should be no debris, sand or butter between the cylinder head pads. Cylinder head, cylinder head gasket, cylinder head bolt, cylinder head cover the cylinder head bolt is fastened to the body according to a certain tightening torque, and the piston and cylinder liner constitute a combustion space, in the cylinder head is generally provided with inlet and exhaust passage, cooling water cavity (water-cooled diesel engine), lubricating oil hole. The cylinder head has a finely machined hole and surface for installing the valve seat ring, valve guide, valve, valve spring, injector, inlet and exhaust pipe, etc. The cylinder head gasket is arranged on the joint surface of the cylinder head and the body to make up for the flatness error of the joint surface of the cylinder body and the cylinder head to ensure the cylinder seal. The cylinder gasket should meet the requirements of high temperature resistance, corrosion resistance, not easy to break, compensation for the flatness error of the joint surface, convenient disassembly, and reusable. Diesel engines are mostly made of steel (or copper) and asbestos cylinder pads. Cover the asbestos with steel (or copper), roll steel around the cylinder hole, and roll copper around the water channel hole and oil hole. In order to improve its thermal conductivity and reduce the temperature difference between the cylinder head and the cylinder body, copper chips or steel wire are added to the asbestos. The cylinder cover is used to seal the valve rocker chamber. Some models are equipped with a pressure reducing mechanism and an oil pressure indicator. The cylinder head not only withstands the high temperature and high pressure action of gas in the work, but also bears the great pre-tightening force of the cylinder head fastening bolt. The heat load of the cylinder head is very serious, and the temperature distribution on the underside is also very uneven. The most serious place of thermal stress is the nose bridge area between the inlet and exhaust valve seat and the valve seat and the combustion chamber insert, which is most prone to crack due to thermal fatigue. The economy, power and working reliability of diesel engine are directly related to the cylinder head. Fugou County Longli Cylinder cover Co., LTD. Longli cylinder cover